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Image of the Week Archive — July 2008
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Relationships between Cloud Condensation Nuclei (CCN) and Aerosol Number Concentration
July 27, 2008 —
Aerosols in the atmosphere are submicron-size particles that often have high number concentrations (CN). Anthropogenic activities contribute substantially to total CN for a number of aerosol species. Every cloud drop starts as cloud condensation nuclei ( . . . [continued]
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What’s going on around cloud edges: interpretations of spectral measurements of the overhead radiance
July 13, 2008 —
Although clouds seem to have a distinct boundary, it has been difficult to define the boundary from remotely-sensed measurements. This problem has major climatic consequences, in particular on studies of aerosol-cloud interactions, which require a precis . . . [continued]
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Diurnal Cycle in Lightning Activity Around U.S.
July 6, 2008 —
Lightning activity varies with the seasons and with the time of day. This figure shows the hour of the day when lightning is most probable at each location in and around the U.S., using the color coding shown in the color bar at the bottom. < . . . [continued]
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Fires observed in Canada during ARCTAS
July 6, 2008 —
These fires near Lake Athabasca in northern Saskatchewan were seen from the NASA P-3 aircraft on June 29, 2008 during the ARCTAS (Arctic Research of the Composition of the Troposphere from Aircraft and Satellites) (upper left). The same fires were identi . . . [continued]
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